Add betterC probing for performance and for applications without drun… (#2753) ...

* Add betterC probing for performance and for applications without druntime
* Build probe pragmas using a pragmaGen function rather than string duplication.
* Add some formatting adjustments

Revert "Move data part of dub.platform to dub.data" ...

This reverts commit a0d80e8.
The approach might be wrong headed and will be reverted until
a more comprehensive diff can be submitted.

Move data part of dub.platform to dub.data ...

We want to separate the data part, which is exposed to the PackageRecipe,
from the actual platform check code, which is used when building.

Don't wastefully execute everything via a shell ...

We should only ever use the shell if we want to use the shell's
features, such as pipes, non-trivial redirection, or shell language
features (branches/loops/etc.).  Otherwise, executing a program via
the shell is pointless and wasteful.

Revert "Make all static library exports contribute to dlls on Windows" ...

This reverts commit 076022c / PR2614.

Make all static library exports contribute to dlls on Windows

reduce dependency on the working directory ...

Improves library API usage and bugs with the build generator

Keep logging functionality out of the public API as requested in https://github.com/dlang/dub/pull/2124#issuecomment-813016939.

New logging module - initial functionality ...

The new module replaces dub.internal.vibecompat.core.log by using the
same function names, but implementing colored output and the left
fixed-width tag. Overloaded functions are provided to output colored
text.

Still missing initLogging() and non-TTY stdout/stderr detection

compilers: Change lflagsToDFlags to avoid scope escape ...

If 'in' implies 'scope', then the parameter is being escaped.

Adapt determinePlatform to the new defaults for Win32 ...

Starting with DMD 2.099, `-m32` defaults to MsCOFF instead of OMF and
`-m32omf` is required to use the OMF format + OPTLINK.

This commit changes the logic to select the appropriate logic based
on the current compiler version. Potentially using the wrong object file
format during platform probing is fine because the codegen is skipped
(dmd is invoked with `-c -o-`).

add CompilerInvocationException ...

thrown from invokeTool and probePlatform if running the compiler exit
with non-zero status code.

Currently on windows when dmd is not in PATH, a regular exception is
thrown from regular initialization routine already. Having a dedicated
exception helps apps show proper error messages more easily.

add UnsupportedArchitecture/CompilerException ...

for API purposes to not match on string prefixes

Add environment variables to BuildSettings (#2121)

Merge pull request #2095 from veelo/depcrecate-public-import ...

Deprecate unused but public import.
merged-on-behalf-of: Petar Kirov <PetarKirov@users.noreply.github.com>

Coloured dependency message. ...

Co-authored-by: Mathias LANG <geod24@gmail.com>

Depcrecate unused but public import.

Remove unused imports.

Remove unused selective imports. These are private imports of symbols that do not occur elsewhere in the file, so they are safe to be removed.

Replace occurences of 'in ref' with 'const scope ref' ...

In support for dlang/dmd#11000

Add architecture x86_omf for windows-dmd

LDC: Suppress noisy warning when cross-compiling via -arch=<triple>

Fix #1206: Remove warning when using ldmd2 or gdmd ...

This warning is being triggered frequently when ldmd2 or gdmd
(dmd-like CLI interface for ldc2 and gdc, respectively)
are used as '--compiler' argument.
They were introduced at the same time as the platform probe
(8ac4848),
probably for defensive programming, but have not proved useful.

Improve cross-compilation support (replace `version` checks by BuildPlatform runtime checks) ...

Also fixes #1249. For LDC as implicit cross compiler, the file
extensions for libraries and object files etc. don't depend on the
compiler, but solely on the target. Targets selected with `--arch` are
correctly probed by dub, so that the parsed `BuildPlatform` represents
the target platform.

Use -dumpfullversion to determine GDC version

Perform the tool chain checks based on the compiler name. ...

Gets rid of the additional methods in the Compiler interface and moves the checks to a more central location, since other generators apart from BuildGenerator might want to perform the checks in the future. Also keeps the API "package" for now to avoid adding insufficiently though-out public APIs.

Change toolchainRequirements fields to Dependency. ...

Also removes some API clutter from Compiler and PackageRecipe.

Remove the additional '|' syntax for toolchain requirements. ...

- '|' seems confusing, given that it is used as a logical AND
- Dependency already supports specifying an arbitrary range and this is the only meaningful use for '|'
- Keeps the possibility open to use '|' as a logical OR in a later version
- Rewords the change log entry and adds a link to the DUB documentation

toolchainRequirements recipe support

Also fix x86_mscoff to be available as a platform specifier. See #1059.